A tempting move to develop the bishop on h6, but it is better to remove the queen from c7 first.
14. f3f4  14... a8d8  15. f1d1 This makes things worse. It's better for White to abandon the d-pawn immediately. 15... g7g6 A mistake in return. 16. a3a4 A good move, preparing Ba3 or Ra3 to defend the d-pawn if necessary.